I brought my car to Portchester BMW and they said that they're going to inspect and replace the wastegates. My SA said that sometimes they won't need to replace the turbos and sometimes they do but they won't know until they remove them.

I thought the wastegate is part of the turbo and they'd have to replace the turbos to stop the rattles? My car is at 78K so it's cutting it close.. and I'm a bit nervous about the turbos.